Full list of all 45 Gears POP! achievements worth 1,000 gamerscore. It takes around 1000 hours to unlock all of the achievements on Windows.
Played Horde with 20 different allies
Reached Max Player Level 20
Earned 2,000,000 Coins
Reached the first League
Killed the enemy Leader with the Hammer of Dawn in Versus
Played 500 Battles in any multiplayer mode
Killed 5 Pins at once with a single Frag Grenade in Versus
Killed 50 enemy Pins with Carmine's Shotgun Blast skill in Versus Battles
Destroyed 10 enemy Outposts with Kait Diaz in Versus
Reached Player Level 10
Earned 200,000 Coins
Won 5 Consecutive Versus Battles
Cleared 50 Horde Waves
Won 100 Versus Battles without losing any of your Outposts
Captured 1000 pieces of cover in Versus
Defeated a Boss in Horde
Got promoted in Arena or League 3 times
Collected 20 new Pins from Gear Packs
Used Marcus Fenix to capture 6 different pieces of cover in a single Versus Battle
Named one of your Squads
Earned 20,000 Coins
Reached Player Level 5
Won a Versus Battle where you captured all available cover positions
Played 25 Fortification Pins in Versus
Played 25 Projectile Pins in Versus
Won a Versus Battle without capturing cover
Got promoted in Arena or League once
Upgraded a Pin 10 times
Played 150 Troop Pins in Versus
Played 10 Battles in any multiplayer mode
Won a Versus Battle 3-0
Upgraded a Pin 3 times
Upgraded a Pin
Won a Versus Battle without losing any of your Outposts
Won a Versus Battle within 2 minutes
Collected a new Pin from a Gear Pack
Completed the Tutorial
Play 1000 Battles in any multiplayer mode
Upgrade a Pin to max level
Get promoted to the highest League
Spend 100,000 Power in any multiplayer mode
Win a Versus Battle with a Squad consisting of only Common rarity Pins
Clear 250 Horde Waves
Clear 500 Horde Waves
Defeat 100,000 pins, win 1000 Versus Battles, reach highest Versus League and clear 1000 Horde Waves